Collapsible arbor



Jan, 16, 1923.

1. T. STONEY.

COLLAPSIBLE ARBOR.

2 SHEETSSHEET I FILED MAR. 29, 1920.

Liz/6 776 Sam. 16, 1923. 1,442,104.

1. T. STONEY.

COLLAPSIBLE ARBOR.

FILED MAR. 29, 1920. Z'SHEETS SHEET 2.

lnverz o1,

Patented Jan. 16, 1923.

UNITED STATES groan '1. STONEY, or GLEVELANDQIOHIO.

coLnArsIBnn ARBOR.

Application filed-March 29, 1920. Serial No. 369,560.

To all whom it may concern:

Be it known that I, JOHN T. STONE-Y, a citizen of the United States,residing at Cleveland, in the county of Cuyahoga and State of Ohio, haveinvented a certain new and useful Improvement in Collapsible Arbors, ofwhich. the following is a full, clear, and exact description. v

The present invention relates to the making of green sand cores formolding purposes and is more particularly directed toward a collapsiblearborfor use in connection with the making of such green sand cores.

The resent form of collapsible arbor is particu arly useful in makingthe under, or supporting green sand core, in carrying out the method ofmolding set, forthin my copending application Serial No. 281,9s5, filedMarch 11th, 1919. However, I do'not wish to be understood as in anywaylimiting the applicability of the present invention, as thecollapsible arbor may be used in making green sand'cores for use otherthan in carrying out-the particular molding method re ferred to. 6

Large cores for molding purposes are usually made of baked sand becausein the baking a certain amount of inherent strength is imparted to thecore which enables it to support its own weight when the core is placedin'a mold. A green sand core usually does not of itself, have suificientinherent strength to permit of its being supportedv at'its ends whenplaced within a mold and where a large coreis made of green sand itisnecessary to provide an interior or strengthening structure whichimparts inherent strength to the finished green sand core..

. It is a prime requisite of such a core support that it be removablefrom the inside of the casting when made, for reasons which are obviousand in the present form of arbor which'is shown the arboris collapsiblein a fashionwhich permits the removal of the arbor from within thecasting without breaking the arbor. Reference should be had to theaccompanying drawings forming apart of this specification in which Fig.1 is a top plan view of a'core box having a collapsible arbor of theresent invention mounted within the same; i 2 is a side elevation ofportions in section 0 the arbor; Fig. 3 is a section along ,A propernumber of plates is provided so as to I strength to the body of greensand when extend through the opening close and intimate contact betweenthe plates 'thel-ine as of Fig. 1; Fig. 4 is a section along the line4l1 ofFig- 1; Fig. 5 is a top plan view of the modified formpf arbor andcore box; Fig. 6 is a transverse section showing the arborin a core boxwith sand; Fig. 7 is an end elevation with por-. tions in section of thecore box with arbor shown in- Fig. 5 Fig. 8 is an elevation of theopposite end member'for the core box, to that shown in Fig. 7. a Y

Referringto the drawings, 1 indicates the wall. of a core box which willof course be of proper configuration to mold; a core of the requiredsize andv shape. Within the core box and extending from end to endthereof is abar 2. This bar from approximately the middle thereof-towardone end is providedwith side ledges 3 and 4 and the surface of thebaronthe underside between the ledges is substantially semi-circular inform, the upper part of the bar is in the instance shown flat. Theportion of the bar whichis provided with the ledges 3 and lis ta-'p'ering, that is to saythe ledges 3v and 4: d1-

verge toward the end of the bar and likewise the side walls of theseledges or. shoulders also diverge.

Cooperating with the ledges 3 and 1 are plates which are indicated'at 6.One of these plates is shown in Fig. '4: and as shown is provlded wlth agroove wlnch coni'orms to the shoulders or ledges 3 and 4 and thesemicircular bottom part of the bar. "The plate ,ously described theywill assume positions upon the bar at diflferent places between theendsthereof. This is illustrated in. Fig. 1.

give sufficient stiffening 'efiect and packed around the plates 6.

The plates are provided with holes or openings such as indicated at 7 inF1g..2 so

.that when the green sand ispackedaround the plates, portionsqof thereen sand will and so form a and the sand;

The forward portion of the bar 2 is also provided with shoulders 8 and 9which are similar to the shoulders 3 and d and these shoulders areadapted to receive and support which may beused and it is entirelywithin the scope of thepresent invention to provide the shoulders 3 anddthroughout the entire extent of the bar 2 and to have the side walls ofthese shoulders arranged in the tapering fashion before explained.

At the end of the bar 2 there is a plate 11. This is shown in elevationin Fig. 3. it is quite the same in many respects as the plates 6 and issecured on the bar 2 in precisely the same fashion but the plateadjacent its lower partis provided with aledge 1.1 which receives a bolt12 having the head thereof on one side or". the ledge and the lowerportion of the bolt is adapted to ex tend through the floor 3 of thecore box and when the bolt is so inserted the lower end of the boltreceives a nut 13 which securely fastens the end plate 11 tothecore boxand. so holds the arborand the plates 6 carried thereby against movementwithin the core box. The arbor 2 at its opposite end has a plate 14which is slidably mounted on the end of the arbor and is Pi'O'VldGtlwith a bolt 15 having a nut 16 by which the plate is secured in the corebox in precisely the same manner as described with respect to the bolt12. Thus both ends of the arbor are anchored within the'corebox and arerigidly held against movement not only during the time whenthe sand ispacked in the core box but also is held against movement with respect tothe core box when the core box is inverted for the purpose ofwithdrawing the core box from the core. Obviously the nuts 13 and 16 areremoved when. the core box is withdrawn.

In using the arbor which has been described the plates 6 are arrangedalong the arbor as indicated in the drawing and the end plates aresecured within the core box, the greensand is then thrown in the box andcompacted by methods which are well known." With the green sand suitablycompacted the core box may be removed and the core positioned; in themold in a well known manner. Obviously the arbor being anchored in thecore box permits the core box to be handled without dangerof damagingthe core.

After casting .has been made the arbor may be disassembled by drivingthe bar 2 in. a direction which 'will'loosen the plates 6. This thenpermits the withdrawal of the bar 2 through an end opening in thecastingandv In Figs. 5 to 8 I have illustrated a different form of collapsiblearbor which may be used in connection with a different type of core box,however. the same principle of construction may be utilized, as beforedescribed. In Figs. to 8 of the drawings re= ferred to there is shown acore box 10.

In Fig. 7 there is shown a core box 10. This core box at its ends isprovided with substantially semicircular openings, oneof which isindicated at 111. and at will be understood that at the opposite endvthere 15 also a semi-circular openingof the sameor different size tothat shown in Fig. 7.

Cooperating with the openings in the ends of the core box are plates 12and 13 these plates being secured in their proper;openings each by meansof a bolt which occupies a slot in the lower part of the end member withwhich it is associated; and: ex tends through an opening formed inthebottom of the core box. The-bolt is slotted to receive a wedge 1%,which when driven home, forms an efficient securing means. i

The endmembers 1 2 and 13 are provided with openings adjacent theirupperparts which are adapted to receive the main member of an arbor. r

In the drawings, this main member of the arbor is indicated at 15, andis made trian gular in shape, as indicated in Fig. 7, as are likewisethe openings in the end plates for the core box. as indicated at 12* inF ig; 7.

The member 15 tapers from one end to the other for a purpose which willbe presently described. Y

Upon the member 15 there are mounted a number of plates such asindicated at '17. 'One of these plates is shown in elevation in Fig. 8,and as will be seen, each plateis provided with an openingsuchasindicated at 17 which is of triangular shapein order to permit themember 15 to. pass'through the opening. Furthermore, each of the platesl'l is provided with a plurality of openings such as indicated at 18*;'r

The various plates 17 are positioned upon the member i=5, and-inorder tohold these plates securely in tl'ieir adjusted position,

'thesize of the opening 17 in the various plates varies in accordancewiththeposition which it is to occupy upon themember 15 the plateshaving the smaller size-opening 17* are placed to their;proper-position, the

box is filled with reen sand to make the core, and in the making of thiscore the usual methods may be employed; that is to say, it maybe jarrammed or hand rammed as may be desirable. The sand when compactedwithin the core box extends through the openings 18 which are formed inthe plates 17, thus exerting a tying or binding action to prevent thedisplacement of the sand with respect to the plates 17. The plates l'l'are preferably tapered, as indicated in Fig. 6, for the purpose ofexerting a wedging ac tion which will assist in holding the sand whenthe core box is inverted.

The arbor which comprises the member 15 with the plates 17*, is acollapsible arbor, that is to say, that when a completed mold has beenmade, in connection with which the core, such as shown in Fig. 6 hasbeen utilized, the collapsible arbor, may be dis-assembled by drivingthe member 15" from the plates 17*, thus dis-assembling the arbor andpermitting the individual parts thereof to be withdrawn from theinterior of the cavity "of the casting.

Having described my invention, I claim:

1. A collapsible arbor comprising a rod which tapers from one end to theother, said rod being provided with a flat side,a plurality of plates,each of said plates being provided with an opening adapted to receivesaid rod, the openings in said plates being of different sizes, wherebythe plates are positioned upon the rod when the rod is introduced to theopenings in the plates, each of the openings in the plates beingprovided with a flat side which communicates with the flat side of therod, thereby preventing rotation between the rod and the plates.

2. A collapsible core comprising a rod which tapers from one end to theother, a plurality of plates, each plate being provided with an openingadapted to receive the said rod, the openings in said plates being ofdifferent sizes whereby the plates are positioned upon the rod when therod and plates are assembled.

3. A collapsible core comprising a rod which at intervals throughout itslength has portions of different cross-sectional area, a plurality ofplates, each of which is provided with an opening to fit one of theaforesaid portions of the rod whereby the plates are spaced andpositioned upon the rod.

4. A collapsible core comprising a rod having atapered portion, saidtapered portion being provided with ledges,'a plurality of plates, eachplate having an opening which co-operates with the ledges of the taperedportion, the said openings in the plates varying in size whereby theplates are positioned upon the tapered portion of the rod at diflerentparts thereof.

5. A collapsible core comprising a rod, a plurality of plates. adaptedto be positioned.

at difierent points upon the rod, an end plate adjacent each end of therod and means associated with each end plate for securing the same to acore box.

6. A collapsible core comprising a rod, a plurality of plates, each ofsaid plates having an opening adapted to receive the said rod, endplates also having openings to receive the rod and means associated witheach end plate for securing the same to a core box.

my signature.

JOHN T. STONEY.

